Arts students completing a double major in statistics must meet the upper-level requirement for the major comprising the prescribed 42 credits. See http://www.calendar.ubc.ca/vancouver/index.cfm?tree=12,215,410,437 . for the required courses. Students enrolled on a combined major with Economics and Statistics cannot take a double major in statistics.
Arts students wishing to complete a double major in statistics cannot self-declare as statistics majors and must apply directly to the Statistics Department (see the FAQ item on applying to transfer to or add Statistics as a major, as the explanations here are also valid for Statistics as a second major).
The thematic concentration requirement can be waived in cases where the students Arts major is in a field where statistics is applied (such as economics and psychology).